Cooling radiator for transformers



Jul 3, 1924 1,500,818

S. HORELICK COOLING RADIATOR FOR TRANSFORMERS Filed Sent. l, 1922 ATTORNEYS Patented July 8, 1924.

UNITED STATES PATENT OFFICE.

SAMUEL HORELICK, OF PITTSBURGH, PENNSYLVANIA, lASSIG-NOR TO PITTSBURGH TRANSFORMER COMPANY, A GORPORATION OF PENNSYLVANIA.

Application filed September To all whom it may concern:

Be it known that I, SAMUEL HoREuoK, a citizen of the United States, residing at Pittsburgh, in the'county of Allegheny and State of Pennsylvania,jhave invented certain new and useful Improvements in Cooling Radiators for Transformers, of which the following is a specification.

This invention relates to cooling means for transformers and particularly to auxiliary cooling apparatus adapted to be connected to a transformer tank to cool the oil in which the transformer is submerged. The object of the invention is to'provide an auxiliary cooling means which will be expensive in manuf acture and having a large radiating surface so as to efliclently 'cool the circulating oil. Further objects of the invention,'particularly in the building up ofthe cooler structure from stock material by bending and welding, will. appear from the following description taken in connection. with the accompanying drawings in which:

Fig. 1 is a plan view of a cooling device showing struction.

-Fig. 2 is an elevational end view of the same.

Figs. 3, 4 and 5 are horizontal sectional views illustrating the process of formation of the walls of the cooling apparatus.

Fig. 6 is a perspective view lookin into the top of the cooling means atone en And Fig. 7 is a diagrammatic view showing a modification.

In the specific embodiment of ;the invention shown in the drawings the cooler G comprises top and bottom end plates H, H joined to an intermediate body portion B.

in dotted 'lines the internal con Each end plate H, H comprises a metal plate 12 bent at 13 to form the plate into V-shape, the ends bein cut in notched form so as to form triangu ar end spaces which are closed by triangular pieces 14 welded in place. Pipe connections 10 and 11 are welded to the top and bottom end plates respectively.

The body B of the cooler consists of steel sheets 15, 16 formed from stock metal by' corrugating the-sheets and assembling them so that the. corrugations 15 of one sheet extend between the opposite corrugations 16 of the othersheet (see Fig. 3), thus leave 1.;A radiator having opposite corrugated 110 1, 1922. Serial No. 585,606.

ing narrow spaces 17 between the overlapping inner ends of the corrugations. This orms a passage of tortuous zig zag formation in transverse section so that a relatively small body of circulating oil has a large exposed surface.

To form a closed container of these cor rugated sheets in assembled formation the outer bends 20 between the corrugations are flattened out as shown at 21 (see Figs. 4 and 6) to come together as indicated at 22. The ends of the corrugations 15, '16" are preferably formed on inclined lines so as to form relatively inclined edges-23, 24 which may be readily turned over and tightly closed by welding as shown (Figs. 5 and 6). The end plates H, H at their sides fit along the inclined surface 21 of the bends 20 between the corrugations, and the triangular end pieces 14 of the headers similarly fit the inclined flange 26 of the sheet ends 16 and the edges .of the end plates are tightly welded in place so as to form a fluid tight structure.

The heated oil in the tank to which connections. 10 and 11 are attached circulates through connection 10, downward through the spaces 17 in the body B wherein it is cooled and discharged out through the lower pipe connection 11 to the transformer tank. The inner surfaces of the sheets 15, 16 are thus in, continuous contact with the oil while the outer surfaces of these sheets 15, 16 are in contact with the air so as to give a sufficient radiating and cooling action.

The cooler'i', readily built up to required size and formed from stock parts by simple cutting, bending and welding operations.

It comp-rises vertically corrugated sheets nested together in compact manner and welded together into a unitary structure of great strength. The circulating oil is spread out into a thin body in close contact with the cooling surfaces so that there are no large bodies of oil remote from thecoolsides and with the corrugations extendin inward and with the outer bends flattened att-he ends and an end plate welded to the flat portions of said sides.

2. A radiator having opposite corrugated sides and with the corrugations extending inward and with the outer bends flattened the corrugations overlapping at the interior so as to form the oil passage into a succession of alternating relatively narrow in ner and relatively wide outer spaces.

5. A radiator formed of tWocOrrugated sheets of metal joined at its sides, the outer bends of the corrugations being closed at their ends so as to form inclined surfaces,

angular sheet metal ends for said radiator secured to said surfaces and extending in the direction thereof, to a central ridge.

6. A radiator having opposite corrugated sides, the corrugations overlapping at the interior, sides of the corrugations joining one another at their ends to close their inner bends and end members secured to said; I

saadradrator ]0]I11I1g the side, coverin the radiator sides and forming a space exten,d. ing across the closed ends of saidcorrugations and in communication with the space between said corrugated sides.

7. A radiator having a corru ated side. the inner bends of the corrugations being closed at their ends and the outer bends of the corrugations being closed to form a series of flat supporting surfaces, an end member having an inclined surface resting upon and secured to said flat surfaces, said end member forming a space extending across the closed inner ends of said corrugations and corrugations.

8. A radiator having a side formed of a single piece of sheet metal formed with a plurality of corrugations the inner bend of each corrugation being closed at its ends and the outer bend ofeach corru ation being closed to form surfaces whic meet to form a continuous supporting edge and an end member secured to said edge and formcommunicating withspaces inside said radiator between said ing a space inside the radiator extending across the closed inner bends of said corrugations.

9. A transformer radiator formed of a single corru ated body portion having its outer face sipation of heat by rising air currents, said body portion comprising opposite corrugated sides, the inner bends of said corrugations being closed'at their ends and the closed corrugations overlapping each other to form a thin space tlierebetween, and an end member joining the sides, extending over the closed ends of the corrugations and forming a space extending across said closed ends and in communication with the space between the inwardly projecting corrugations.

10. A radiator comprising opposite corrugated sides, the inner bends of said corrugations being inclined downwardly from the inside toward the outside at the bottom of the radiator, said corrugations 1 being closed at their ends and the closed corrugations overlapping each other to form a thin space therebetween, and an end member joining the sides, covering the closed ends'of the corrugations and forming a space extending across said closed ends and'in communication with the space between the inwardly projecting corrugations.

11. A radiator having a sheet metal corrugated side, the inner bends of the cor.- rugations of said side being closed at their ends for the greater part of the depth of said corrugations and an end member for closed ends of the corrugations and orming a space extending across said closed ends and in communication with the spaces inside said radiator between said corrugations. j

12. A radiator having opposite corrureely exposed to permit disgated sides, the inner bends of said corrugations being closed at their ends, said ends being inclined from the outside inwardly in a direction towardthe central portion of the radiator and the closed-corrugations overlapping one another to .form a thin space therebetween, radiator ends forming spaces extending across the closed ends 0, said corrugations and in communication with the space between said inwardly projecting corrugations and means forming fluid inlet and outlet passages communicating with said end spaces, said radiator ends having walls which are inclined toward said passages SAMUEL HORELICK. 

